Final states involving top-quark pairs were considered in
the articles [1]}, [2]}, [3]}, [4]}, [5]}, [6]}.
Searches for a \({E}_T + b \bar{b}\)  signal [7]}, [1]}, [4]} also provide an interesting avenue
to probe (REF ) and (),
while the constraints from mono-jet searches on the scalar and
pseudoscalar interactions involving the light quark flavors
are very weak due to the strong Yukawa suppression (as
discussed in detail in [10]}, [11]}), and
thus are unlikely to be testable at the LHC. Scenarios where
the DM-SM interactions proceed primarily via gluons have also
been considered [12]}.
<FIGURE>